角秒,又称弧秒,是量度角度的单位,即角分的六十分之一,符号为"。在不会引起混淆时,可简称作秒。“角秒”二字只限用于描述角度,不能于其他以“秒”作单位的情况使用(如时间)。
星间的视角距离(Apparent angular separation)是用角秒(Second of arc)来量的。如所分辨的两颗同星等(即同样亮度)的星其视角距离为θ,望远镜之直径为D,则
基于80个网页-相关网页
... 角鉴别率 angular resolution 角秒 angular second 角灵敏度 angular sensitivity ...
基于12个网页-相关网页
微角秒天体测量 micro-arcsec astrometry
亚毫角秒光波天体测量 submilliarcsecond optical astrometry
角百分制秒 centesimal second of angle
纳秒三角波脉冲 Nanosecond triangle waveform pulse
静态定位精度优于20角秒,比改造前的仪器提高了一个数量级。
The precision of the static orientation is better than 20 arc-seconds, improved by an order of magnitude.
指出中期异常的特征是破坏年变化规律,异常时间在半年以上,幅度可达几个角秒。
The medium-range tilt anomaly was characterized by the violation of the regularity of annual variation. The magnitude of the anomaly may amount to a few seconds and lasted for about half a year.
也就是能够分开两个距离很近的两颗星的能力,单位是角秒1(seconds of arc)。
It is the ability to separate two closely-spaced stars into two distinct images measured in seconds of arc.
应用推荐